Fatty acid salt pesticidal composition

Abstract: A non-phytotoxic, environmentally compatible composition provides improved efficacy against soft-bodied insects and mites. The composition comprises a fatty acid salt active ingredient and an adjuvant that surprisingly increases the spreadability and efficacy of the active ingredient. The active ingredient is a potassium, sodium, ammonium, or alkanolamine salt of one or a mixture of monocarboxylic fatty acids having from 8 to 22 carbon atoms. The adjuvant can be a fatty alcohol having from 4 to 18 carbon atoms, or a methyl or ethyl ester of fatty acids having from 4 to 18 carbon atoms. The ratio of the adjuvant to the active ingredient ranges from about 1:0.1 to 1:50.

Description: The invention relates to pesticidal compositions, particularly those having insecticidal and miticidal activity, that are formed from environmentally safe compounds. Fatty acids are naturally occurring, readily biodegradable compounds. The salts of certain fatty acids are known to have insecticidal and miticidal properties. Indeed, fatty acid salts having from 8 to 18 carbon atoms, particularly unsaturated C18 fatty acids, are toxic to many soft bodied insects. Such insecticidal compounds are desirable because their biodegradability renders them ecologically safe compounds. However, fatty acid salt insecticides are acute toxins that exhibit no residual activity. To be effective as a pesticide these compounds must contact target pests. Factors which influence the effectiveness of such insecticides include the ability of the compound to effectively spread on a target surface and the ability of the compound to penetrate the insect's cuticle. Various fatty acid-based pesticidal compositions are disclosed in U.S. Patent Nos. 4,774,234; 4,826,678; and 5,093,124. WO-A-89/10693 discloses arthropodicidal solutions for application on plants containing mono alpha carboxylic acids of hydrocarbons having 8 to 20 carbon atoms and/or monovalent metal salts thereof. Although these solutions show a good short time activity they exhibit no residual activity. GB-A-2,247,621 refers to a herbicidal composition comprising an aliphatic carboxylic acid, a salt thereof and an alcohol; the alcohol may be a C 1-16 -alcohol. Herbicidal activity means that the composition is capable of retarding the growth of, or killing, plant life such as herbage and/or undesirable flora. US-A-5,093,124 discloses environmentally safe pesticide solutions wherein a first component consists of one or a mixture of mono alpha carboxylic acids of a hydrocarbon having between 8 and 18 carbon atoms, or an alkali metal salt thereof, and a minor amount of a phytotoxicity-reducing water soluble material such as lecithin, a seaweed extract, or a mixture thereof. Fatty alcohols are not soluble in water, therefore these compounds are not effective for increasing spreading properties of water. Higher fatty alcohols have been reported to be active against aphids. (See Bosquet et al. Industrial and Engineering Chemistry, 27:1342-44 (1935). However, derivatives of fatty alcohols have been used more extensively than fatty alcohols themselves as pesticides. U.S. Patent Nos. 1,993,040 and 1,963,100 disclose the use of higher alkyl thiocyanates, isothiocyanates, selenocyanates, isoselenocyanates, tellurocyanates, and isotellurocyanates in pesticidal formulations. U.S. Patent No. 3,199,944 discloses the use of long chain fatty alcohols as film formers able to be applied to bodies of water to inhibit evaporation. Similarly, Han (Plant Disease, April 1990, 263) discloses the use of a composition containing dodecyl alcohol to form a film or membrane over living plants. The membrane accommodates the passage of oxygen and carbon dioxide, but prevents the passage of water. Such a composition is reported to protect plants from insects, disease, cold, and dehydration. Despite the known effectiveness of certain fatty acid-based compositions as pesticides, there is still a need for similar environmentally-compatible compositions that provide enhanced efficacy as well as ease and economy of manufacture. It is accordingly an object of the invention to provide a fatty acid salt-based pesticidal composition having improved efficacy against a wide range of insects and mites. Another object is to provide an environmentally compatible pesticidal composition having enhanced activity. A further object is to provide a fatty acid salt-based pesticidal composition exhibiting improved handling characteristics and improved spreadability. Other objects will be apparent to one of ordinary skill in the art upon reading the disclosure that follows. The invention relates to the use of an insecticidally or miticidally effective non-phytotoxic amount of one or a mixture of fatty acid salts having from 8 to 22 carbon atoms; and an adjuvant to increase the spreadability and efficacy of the fatty acid salt, the adjuvant selected from the group consisting of fatty alcohols having from 4 to 18 carbon atoms and fatty acid esters selected from the group consisting of the methyl or ethyl esters of fatty acids having from 4 to 18 carbon atoms, the ration of the adjuvant to the fatty acid salt being in the range of 1:10 to 1:50 as an environmentally compatible composition toxic to insects and mites. The fatty acid salt active ingredient may be present at a range of 0.1 to 2.0. percent by weight. The ratio of the adjuvant to the fatty acid salt active ingredient ranges from 1:0.1 to 1:50, and more preferably from 1:10 to 1:50. The composition may also include an organic solvent which may be a lower alcohol, a glycol or a vegetable or mineral oil. Among the advantages of the pesticidal composition of the invention are its environmental compatability and its effectiveness against a variety of insects and mites. Moreover, the composition exhibits low phytotoxicity and may be applied directly to plants upon which the target pests are present. In another aspect, the invention provides a method of controlling pests, such as insects and mites, through the use of the composition. Detailed Description of the Invention The invention provides an environmentally-compatible, non-phytotoxic pesticidal composition effective against a variety of insects and mites. The composition comprises a fatty acid salt-based active ingredient and an adjuvant to enhance spreadability of the fatty acid salt. The fatty acid salt active ingredient comprises one or a mixture of fatty acid salts having from 8 to 22 carbon atoms. The salts preferably are monovalent metal salts, such as potassium and sodium, or ammonium salts of fatty acids. Other useful fatty acid salts include polyvalent metal salts and alkanolamine salts. Suitable polyvalent metal salts include the iron, calcium, and copper salts of fatty acids having from 8 to 22 carbon atoms. Suitable alkanolamine salts are the mono-, di-, and tri-ethanolamine salts of fatty acids having from 8 to 22 carbon atoms. Among the most preferred fatty acid salt compounds are the potassium, sodium, and ammonium salts of oleic acid, linoleic acid, or linolenic acid. Other preferred active ingredients include the sodium, potassium, and ammonium salts of coconut fatty acid. Coconut fatty acid, as is understood by those of ordinary skill in the art, is a mixture of various fatty acids. A typical fatty acid profile of coconut fatty acid is as follows: 7% caprylic acid C8 6% capric acid C10 48% lauric acid C12 19% myristic acid C14 9% palmitic acid C16 2% stearic acid C18 8% oleic acid C18:1 1% linoleic acid C18:2 Other useful active ingredients include salts of neem oil or various vegetable oils, including soybean oil salts, sunflower oil salts, canola oil salts, olive oil salts, and sesame oil salts. Sodium, potassium and ammonium salts of these oils are among the most preferred. Typical fatty acid profiles of such oils are as follows: Sunflower Oil 8% palmitic acid C16 3% stearic acid C18 0.5% arachidic acid C20 0.2% behenic acid C22 20% oleic acid C18:1 67.8% linoleic acid C18:2 0.5% linolenic acid C18:3 Canola Oil 5% palmitic acid C16 2% stearic acid C18 63% oleic acid C18:1 20% linoleic acid C18:2 9% linolenic acid C18:3 1% eicosenoic acid C20:1 Olive Oil 12% palmitic acid C16 2% stearic acid C18 0.5% arachidic acid C20 2% palmitoleic acid C16:1 70% oleic acid acid C18:1 13% linoleic acid C18:2 0.5% linolenic acid C18:3 Sesame Oil 9% palmitic acid C16 5% stearic acid C18 42.5% oleic acid C18:1 43% linoleic acid C18:2 0.5% linolenic acid C18:3 Soybean Oil 0.5% lauric acid C12 0.5% myristic acid C14 12% palmitic acid C16 25% oleic acid C18:1 52% linoleic acid C18:2 6% linolenic acid C18:3 Neem Oil trace myristic acid C14 16% palmitic acid C16 18% stearic acid C18 2% arachidic acid C20 0.5% behenic acid C22 53% oleic acid C18:1 10.5% linoleic acid C18:2 The fatty acid salts that form the active ingredient of the pesticidal composition of the invention may be obtained commercially or may be formed by techniques well known in the art. The concentration of the fatty acid salt can vary depending upon the needs of a given application. Generally, however, the fatty acid salt is present at a range of about 0.1 to 2.0 percent by weight of a ready-to-use composition. The composition, may, however, be formulated as a concentrate having 50% by weight of the fatty acid salt active ingredient. The concentrate may be diluted with water before use to achieve a fatty acid salt concentration in the range of 0.1 to 2.0 percent by weight. The fatty acid salt active ingredient is known to be effective against insects and mites. However, these pesticides have no residual activity and thus must contact a target pest to be effective. It would thus be beneficial to increase the ability of the fatty acid salt active ingredient to spread over a target surface without increasing phytotoxicity of the composition and without jeopardizing the environmental compatability of the composition. Such an increase in the area covered by a given amount of the composition could increase the chances of contacting and killing a target pest. Intrinsic changes that increase spreadability could also increase the ability of compounds to penetrate the insect cuticle, trachae and spiracles, and thus improve efficacy. Surprisingly, it has been found that fatty alcohols or fatty acid esters can be used as adjuvants to increase the spreadability of fatty acid salts. The use of such compounds yields a synergistic increase in the efficacy of the fatty acid salt. The fact that such compounds can serve as effective adjuvants is surprising because fatty alcohols are not soluble in water and cannot improve the spreading of water. Thus it is entirely unexpected that these compounds, when added to fatty acid salts, can increase the spreading and efficacy of the fatty acid salt. The unexpectedness of this discovery is highlighted by the fact that various surfactants, known to be good spreaders, did not increase the spreadabilty of the fatty acid salt active ingredient. Fatty alcohols preferred for use with the invention include those having from 4 to 18 carbon atoms and, more preferably, those having from 10 to 14 carbon atoms. Among the most preferred fatty alcohols are decanol, undecanol, dodecanol, and tetradecanol. A preferred concentration range for these adjuvants, in a ready-to-use composition, is 200 ppm (0.02% by wt.) to 2500 ppm (0.25% by wt.) or, more preferably, 200ppm (0.02% by wt.) to 2000 ppm (0.20% by wt.). The fatty alcohols can also be used at a higher concentration, (e.g., 0.25 to 2.0% by wt.). Fatty acid esters preferred for use with the invention include methyl or ethyl esters of fatty acids having from 4 to 18 carbon atoms, and more preferably the methyl or ethyl esters of fatty acids having from 10 to 14 carbon atoms. Among the most preferred fatty esters are the methyl and, ethyl esters of capric acid, lauric acid, and myristic acid. One of ordinary skill in the art will understand that such fatty esters can be obtained commercially or prepared by the condensation reaction of the appropriate fatty acid with methanol or ethanol. A preferred concentration range for the fatty alcohol and fatty ester adjuvants is 200 ppm (0.02% by wt.) to 2500 ppm (0.25% by wt.) or, more preferably, 200 ppm (0.02% by wt.) to 2000 ppm (0.20% by wt.). Like fatty alcohols, fatty esters may also be present at a concentration equivalent to the fatty acid salts (e.g., 0.1 - 2.0% by wt.). The ratio of the adjuvant to the fatty acid salt may vary depending upon the intended use of the composition. Generally, it is preferred that this ratio be in the range of approximately 1:10 to 1:50. The adjuvant, as noted above, may also be present at a concentration range higher than that of the fatty acid salt such that the ratio of the adjuvant to the fatty acid salt is about 1:0.1. Such a composition, when applied to living plants, can act as an antitranspirant. Moreover, the composition can also control and provide protection against some plant diseases. In one embodiment, a relatively small amount of a free fatty acid having from 2 to 22 carbon atoms can be used as an adjuvant. The free fatty acid can be present at less than 10 percent by weight of a concentrated formulation, and more preferably is present at 3 to 5 percent by weight of a concentrated formulation. The free fatty acid can be obtained commercially and incorporated into the formulation. One suitable fatty acid is oleic acid which may be obtained from a number of sources. Alternatively the free fatty acid can be obtained by only partially neutralizing the fatty acid salt present in the formulation. For example, in preparing the fatty acid salt by techniques well known to those of ordinary skill in the art, one could react an insufficient amount of base with the acid, thus leaving a desired amount of free fatty acid in the formulation. The free acid may also be obtained by adding a strong acid (e.g., hydrochloric acid, nitric acid, boric acid) to a fatty acid salt formulation to yield an appropriate amount of free fatty acid. The composition may also include an organic solvent. Suitable solvents include lower alcohols (e.g., methanol, ethanol, and isopropanol), glycerol, ethylene glycol, propylene glycol, vegetable oil, and mineral oil. The solvent may be present in a ready-to-use formulation at a concentration range of 30 to 45 percent by weight. Generally, the composition can be prepared and stored in a concentrated formulation. Before use the concentrate is diluted with water to achieve the desired concentration of active ingredient. A preferred concentrate typically contains 50 percent by weight of the active ingredient, 30 to 45 percent by weight of solvent, and 1 to 10 percent by weight of adjuvant. The balance of the concentrate can be made up of water. Alternatively, the composition can be prepared by drying the fatty acid salt to powder form and combining the powder with the adjuvant (e.g., fatty alcohol). The composition can thus be formulated as a wettable powder or granule formulation. In addition to providing increased efficacy, the pesticidal compositions of the invention are desirable as they exhibit low phytotoxicity. As a result, they are able to be applied directly to living plant tissue upon which insects and mites are present without damaging the plant. The composition of the invention is effective against mites and against soft bodied insects, particularly those of the Order Homoptera (e.g., aphids, adelgids, leafhoppers, mealybugs, psyllids, scales, and whitefly). The composition is also effective against species in other orders incuding Order Dermaptera (e.g., European earwig), Order Thysanoptera (e.g., thrips), Order Siphonaptera (e.g., fleas), Order Diptera (e.g., fungus gnats), Order Lepidoptera (e.g., tent caterpillars), Order Hymenoptera (e.g., rose bug), Order Orthoptera.(e.g., grasshoppers), Order Hemiptera (e.g., boxelder bug). The following non-limiting examples serve to further describe the invention. Example 1: Summary of spreading results for a potassium oleate formulation with various alcohols Concentrated potassium oleate formulations (50.0% active ingredient (ai)) were prepared and 4.0% of the appropriate fatty alcohol was added. Spreading was evaluated with samples diluted to 1.0% ai. Spreading was evaluated using a standardized parafilm assay. An Eppendorf pipettor dispensed 100 microliter of each sample onto a sheet of parafilm. The droplet was allowed to spread for 90 seconds and the droplet diameter was measured to determine the area covered. The data obtained are illustrated in Table 1. Spreading of salt + various alcohols mean area (mm 2 /π) methanol + ai 33.6 ethanol + ai 32.2 propanol + ai 32.5 isopropanol + ai 34.8 butanol + ai 31.4 2-methyl-butanol + ai 34.2 pentanol + ai 33.4 heptanol + ai 39.0 octanol + ai 37.8 nonanol + ai 41.0 decanol + ai 41.8 undecanol + ai 50.6 undecenyl alcohol + ai 42.9 dodecanol + ai 58.1 tetradecanol + ai 50.4 hexadecanol + ai 33.6 oleyl alcohol + ai 40.3 ai alone 34.0 Example 2: Spreading of potassium coconate with dodecanol A concentrated potassium coconate formulation (50.0% ai) was prepared and 4.0% dodecanol was added. Spreading was evaluated with samples diluted to 1.0% ai. Spreading was evaluated using the standardized parafilm assay described in example 1, and the results obtained are illustrated in Table 2. Sample Mean Spreading Area (mm 2 /π) potassium coconate alone 25.50 potassium coconate + dodecanol 59.29 distilled water 11.90 Example 3: Efficacy of potassium oleate ai with decanol against European earwig, Forficula auricularia European earwig adults, F. auricularia , were collected from the field for testing. For each replicate, five insects were placed in each 30 dram vial. Treatments were applied with hand-held trigger sprayers (approximately 3-5 ml per replicate) by spraying directly into vials. Vial contents were then emptied onto paper towel lined styrofoam plates to drain off excess solution. Alter treatment, insects were transferred into a filter paper lined petri plate which contained a piece of lettuce and a piece of nasturtium leaf. Mortality was assessed alter 72 hours, and the data are illustrated in Table 3. Treatment Observed Mean % Mortality Expected Mean % Mortality 1. 0.5% ai 45.0 - 2. 1.0% 50.0 - 3. 1000 ppm decanol 5.0 - 4. 0.5% ai + 1000 ppm decanol 80.0 50.0 5. 1.0% ai + 1000 ppm decanol 92.5 55.0 6. dH 2 O 7.5 - Example 4: Efficacy of potassium oleate formulations with higher fatty alcohols against European earwig, F. auricularia Adults earwigs, F. auricularia , were treated using the standardized acute bioassay described in example 3. Mortality was assessed after 48 hours, and the data are illustrated in Table 4. Treatment Observed Mean Mortality Expected Mean % Mortality 0.5% ai alone 40.0 - 1.0% ai alone 45.0 - 0.1% decanol alone 5.0 - 0.1% dodecanol alone 2.5 - 0.1% tetradecanol alone 0.0 - 0.5% ai + 0.1% decanol 60.0 45.0 1.0% + 0.1% decanol 87.5 50.0 1.0% + 0.1% dodecanol 97.5 47.5 1.0% + 0.1% tetradecanol 70.0 45.0 Example 5: Efficacy of potassium oleate with decanol and dodecanol against variegated cutworm larvae, Peridroma saucia (Hbn.) Variegated cutworm, P. saucia , were reared in the laboratory on artificial diet. Each replicate, consisting of five larvae (3rd instar), was transfered onto a styrofoam plate and treatments were applied with hand-held trigger sprayers (approximately 3-5 ml per replicate). Alter treatment, insects were transferred onto paper towel lined styrofoam plates to drain off excess soultion. Each larva was then placed into an individual cell of a 50 cell plastic tray. Each cell contained a small piece of artificial diet and trays were covered with plate glass. Mortality was assessed alter 48 hours, and the data are illustrated in Table 5. Treatment Observed Mean % Mortality Expected Mean % Mortality 0.5% ai 87.5 - 0.1% decanol alone 0.0 - 0.5% ai + 0.1% decanol 92.5 87.5 0.5% ai alone 72.5 - 0.1% dodecanol 0.0 - 0.5% ai + 0.1% dodecanol 92.5 72.5 Example 6: Efficacy of potassium oleate with various fatty alcohols against cutworm larvae, P. Saucia Variegated cutworm larvae (4th to 5th instar), P. saucia , were treated using the standardized acute bioassay described in example 5, and the data are illustrated in Table 6. Treatment Observed Mean % Mortality Expected Mean % Mortality 0.5% ai 7.5 - 0.1% tetradecanol alone 2.5 - 0.5% ai + 0.1% tetradecanol 22.5 10.0 0.1% hexadecanol alone 2.5 - 0.5% ai + 0.1% hexadecanol 17.5 10.0 0.1% 2-methyl-butanol 0.0 - 0.5% ai + 0.1% 2-methyl-butanol 27.5 7.5 distilled water 0.0 - Example 7: Efficacy of potassium oleate with higher fatty alcohols against twospotted spider mite, Tetranychus urticae Koch Bush bean plants were cut back to two leaves each. A band of white petroleum jelly was applied at the base of the petioles (i.e., node) to contain mites on the leaves. Foliage covered with mites was obtained from a rearing facility and placed in plastic bags. Twenty-five adult female mites were transferred from the rim of the plastic bag, using a camel hair brush, to one leaf on each plant. Mite infested plants were left overnight and treatments were applied to wetting the next day (top and bottom leaf surfaces) using hand-held trigger sprayers. After treatment, plants were set out in a completely randomized block design on a lab bench. Mortality was assessed 24 hours alter treatment, and the data are illustrated in Table 7. Treatment Observed Mean % Mortality Expected Mean % Mortality 1.0% ai alone 89.7 - 800 ppm dodecanol 77.1 - 800 ppm tetradecanol 56.8 - 800 ppm hexadecanol 57.2 - 1.0% ai + 800 ppm dodecanol 97.4 100.0 1.0% ai + 800 ppm tetradecanol 99.2 100.0 1.0% ai + 800 ppm hexadecanol 100.0 100.0 distilled water 16.3 - Example 8: Efficacy of potassium oleate with decanol against cabbage aphid, Brevicorye brassicae (L.) Cabbage aphids, B. brassicae , were collected from the field and brushed onto plate glass for treatment. Each replicate, consisting of 10 aphids, were sprayed with one spray from a hand-held trigger sprayer. After one minute, treated aphids were transferred into filter paper lined petri plates using a fine camel hair brush. Mortality was assessed after 24 hours, and the data are illustrated in Table 8. Treatment Observed Mean % Mortality Expected Mean % Mortality 0.5% ai 48.0 - 400 ppm decanol 9.0 - 0.5% ai + 400 ppm decanol 63.0 57.0 distilled water 14.0 - Example 9: Efficacy of potassium oleate with decanol and potassium coconate with dodecanol against cabbage aphid, B. brassicae Cabbage aphids, B. brassicae . were treated using the standardized aphid plate glass bioassay described in example 8. The data are illustrated in Table 9. Treatment Observed Mean % Mortality Expected Mean % Mortality 0.5% K + oleate ai alone 52.0 - 400 ppm decanol alone 6.0 - 0.5% K + oleate ai + 400 ppm decanol 65.0 58.0 0.5% ai K + coconate alone 18.0 - 0.5% ai K + coconate + 400 ppm dodecanol 35.0 21.0 400 ppm dodecanol alone 3.0 Example 10: Efficacy of dodecanol and potassium oleate against tobacco aphids, Myzus nicotianae_ Blackman Tobacco aphids, M. nicotianae , were obtained from a rearing facility and treated using the standardized aphid plate glass bioassay described in Example 8, and the data are illustrated in Table 10. Treatment Observed Mean % Mortality Expected Mean % Mortality 1.0% dodecanol 34.0 - 0.1% ai 4.0 - 1.0% dodecanol + 0.1% ai 71.0 38.0 1.0% ai 28.0 - 0.1% dodecanol 2.0 - 1.0% ai + 0.1% dodecanol 39.0 30.0 distilled water 1.0 - Example 11: Spreading of potassium oleate formulation with esters A concentrated potassium oleate formulation (50.0% ai ) was prepared and 4.0% of the appropriate ester was added. Spreading was evaluated with samples diluted to 1.0% ai. Spreading was evaluated using the standardized parafilm assay described in example 1, and the data are illustrated in Table 11. Formulation Mean Area (mm2/π) potassium oleate alone 36.0 potassium oleate + 4% methyl laurate 40.3 potassium oleate + 4% methyl caprate 36.6 potassium oleate + 4% ethyl caprate 37.8 Example 12: Efficacy of potassium oleate with esters against bean aphid, Aphis fabae Scopoli Bean aphids, A. fabae , were treated using the standardized aphid plate glass bioassay described in example 8, and the data are illustrated in Table 12. Treatment Mean % Mortality 1. 1.0% ai 69.0 2. 1.0% ai w/ 800 ppm decanol 88.0 3. 1.0% ai w/ 800 dodecanol 86.0 4. 1.0% ai w/800 ppm methyl laurate 88.0 5. 1.0% ai w/methyl caprate 84.0 6. 1.0% ai w/ 800 ppm ethyl caprate 87.0 7. dH 2 O 3.0 Example 13: Efficacy of potassium sunflower oil salt with dodecanol against European earwig, Forficula auricularia L. European earwig adults, F. auricularia , were collected from the field for testing. For each replicate, five insects were placed in each 30 dram vial. Treatments were applied with hand-held trigger sprayers (ca. 3-5 ml per replicate) by spraying directly into vials. Vial contents were then emptied onto paper towel lined styrofoam plates to drain off excess solution. After treatment, insects were transferred into a filter paper lined petri plate which contained a piece of nasturtium leaf and a piece of nasturtium flower. Mortality was assessed alter 72 hours and the data are illustrated in Table 13. Treatment Mean % Mortality 1. 1.0% ai 32.5 2. 1.0% ai + 800 ppm dodecanol 62.5 3. dH 2 O 5.0 Example 14: Efficacy of potassium olive oil and sunflower oil salts with dodecanol against bean aphid, Aphis fabae (Scopoli) Bean aphids, A. fabae , were reared on nasturtium plants in the laboratory and brushed onto plate glass for treatment. Each replicate consisting of 10 aphids, were sprayed with one spray from a hand-held trigger sprayer. After one minute, treated aphids were transferred into filter paper lined petri plates using a fine camel hair brush. Mortality was assessed after 24 hours and the data are shown in Table 14. Treatment Mean % Mortality 1. 1.0% ai K + olive oil salt 52.0 2. 1.0% ai K + olive oil salt + 800 ppm dodecanol 63.8 3. 1.0% ai K + sunflower oil soap 48.0 4. 1.0% ai K + sunflower oil soap + 800 ppm dodecanol 72.0 5. dH 2 O 8.0 Example 15: Efficacy of sodium/potassium sunflower oil salt with dodecanol against bean aphid, A. fabae Bean aphids, A. fabae , were treated using the standardized aphid plate glass bioassay described in example 14. The data obtained are shown in Table 15. Treatment Mean % Mortality 1. 1.0% ai Na + /K + sunflower oil salt 34.0 2. 1.0% ai Na+/K + sunflower oil soap + 800 ppm dodecanol 65.0 3. dH 2 O 2.0 Example 16: Spreading of potassium oleate with excess fatty acid. Concentrated potassium oleate formulations (50% ai) were prepared with various amounts of KOH to produce salts with excess fatty acid (primarily oleic acid). Spreading was evaluated with samples diluted to 1.0% ai (salt + fatty acid). Spreading was evaluated using a standardized parafilm assay. An Eppendorf pipettor dispensed 100 microliter of each sample onto a piece of parafilm. The droplet was allowed to spread for 90 seconds and then the droplet diameter was measured to determine the area covered. The data is illustrated in Table 16. Sample Mean Spreading Area (mm 2 /π potassium oleate - neutralized 33.45 potassium oleate - 3% excess fatty acid 46.92 potassium oleate - 5% excess fatty acid 52.80 potassium oleate - 10% excess fatty acid 52.32 potassium oleate - 15% excess fatty acid 49.23 potassium oleate - 20% excess fatty acid 51.12 potassium oleate - 25% excess fatty acid 50.65 Example 17: Efficacy of potassium oleate with excess fatty acid against bean aphid, A. fabae Bean aphids, A. fabae , were treated using the standardized aphid plate glass bioassay described in example 14. For each replicate, aphids were transferred into filter paper lined petri plates after exposure to treatments for 75 seconds. The data are illustrated in Table 17. Treatment Mean % Mortality 1. Potassium oleate - neutralized 21.0 2. Potassium oleate - 3% excess fatty acid 53.0 3. Potassium oleate - 5% excess fatty acid 54.0 4. Potassium oleate - 10 % excess fatty acid 43.0 5. dH 2 O 2.0 Example 18: Efficacy of a diethanolamine salt of oleic acid with dodecanol against bean aphid, A. fabae Bean aphids, A. fabae , were treated using the standardized aphid plate glass bioassay described in example 14. For each replicate, aphids were transferred into filter paper lined petri plates alter exposure to treatments for 75 seconds. The data are illustrated in Table 8. Treatment Observed Mean % Mortality Expected Mean % Mortality 1. 1.0% ai 50.0 - 2. 800 ppm dodecanol 1.0 - 3. 1.0% ai + 800 ppm dodecanol 62.0 51.0 4. dH 2 O 3.0 - It is understood that various modifications may be made to the invention described herein without departing from the intended scope of the claims.

Claims: Use of an insecticidally or miticidally effective non-phytotoxic amount of one or a mixture of fatty acid salts having from 8 to 22 carbon atoms; and an adjuvant to increase the spreadability and efficacy of the fatty acid salt, the adjuvant selected from the group consisting of fatty alcohols having from 4 to 18 carbon atoms and fatty acid esters selected from the group consisting of the methyl or ethyl esters of fatty acids having from 4 to 18 carbon atoms, the ratio of the adjuvant to the fatty acid salt being in the range of 1:10 to 1:50 as an environmentally compatible composition toxic to insects and mites. Use of the composition according to claim 1, wherein the fatty acid salt is a potassium, sodium, iron, calcium, copper, ammonium, or alkanolamine salt of monocarboxylic fatty acids having from 8 to 22 carbon atoms. Use of the composition according to claim 1 or 2, wherein the fatty acid salt is selected from the group consisting of potassium, sodium or ammonium coconut fatty acid salts, potassium, sodium or ammonium linoleic acid salts, potassium, sodium or ammonium oleic acid salts, potassium, sodium or ammonium linolenic acid salts, and potassium, sodium or ammonium vegetable oil salts. Use of the composition of any one of claims 1 to 3, wherein the fatty acid salt is present in a ready-to-use formulation at a concentration range of 0.1 to 2.0 percent by weight. Use of the composition of any one of claims 1 to 4, wherein the fatty alcohol is selected from the group consisting of decanol, undecanol, dodecanol, and tetradecanol. Use of the composition of any one of claims 1 to 5, wherein the fatty acid ester is selected from the group consisting of the methyl and ethyl esters of capric acid, lauric acid, and myristic acid. Use of the composition of any one of claims 1 to 6, wherein the adjuvant component is present in a ready-to-use formulation at a concentration of between 200 and 2500 ppm. Use of a composition containing in a ready-to-use formulation: an active ingredient selected from the group consisting of the sodium, potassium or ammonium salts of oleic acid, linoleic acid and coconut fatty acid, present at a concentration in the range of 0.1 to 2.0% by weight; and an adjuvant selected from the group consisting of decanol, undecanol, dodecanol, tetradecanol, and methyl and ethyl esters of capric, lauric, and myristic acids, the ratio of the adjuvant to the active ingredient being in the range of 1:10 to 1:50 as an environtmentally compatible composition toxic to insects and mites. Use of a composition according to claims 1 to 8 in a concentrated formulation at a range of 3 to 5 percent by weight wherein the adjuvant is a free fatty acid having from 2 to 22 carbon atoms. Use according to claims 1 to 9, wherein an organic solvent which is preferably a lower alcohol, a glycol or a vegetable or mineral oil is further comprised. An environmentally compatible composition toxic to insects and mites, containing: an insecticidally or miticidally effective, non-phytotoxic amount of one or a mixture of fatty acid salts having from 8 to 22 carbon atoms; and an adjuvant to increase the spreadability and efficacy of the fatty acid salt, the adjuvant being a fatty acid ester selected from the group consisting of the methyl or ethyl esters of fatty acids having from 4 to 18 carbon atoms, the ratio of the adjuvant to the fatty acid salt being in the range of 1:10 to 1:50. A method of killing insects and mites on a surface, containing: applying an insecticidally or miticidally effective amount of a composition according to any one of claims 1 to 10 to insects or mites on surfaces infested insects or mites. The method of claim 12 wherein the composition is non-phytotoxic and is applied to living plant tissue.

Inventors: ALMOND DAVID S, PARKER DIANA L, ALMOND, DAVID S., PARKER, DIANA L.
Applicants: NEUDORFF W GMBH KG, W.NEUDORFF GMBH KG
Application year: 1994
Main classification: A01N37
IPC codes: A01N37